Burglar s alarm



` against an upright spring Cr, which spring G UNITED 'sTATEs PATENToEEIoE.

H. HERSH, B. BAUMAN, AND H. C. LOCHER, OF LANCASTER, PENNSYLVANA.`

BUaGLAas ALARM.

Specification of Letters Patent No. 19,973, dated April 13, 1858.

To all whom 'it may concern:

Be it known that we, HENRY HERSH, BENJAMIN BAUMAN, and HENRY C. LOCHER,of the city of Lancaster and State of Pennsylvania, have invented newand useful Improvements in Alarms for Prisons or Public Buildings; andwe do hereby declare that the following is a full and eXact descriptionthereof, reference being had to the accompanying drawings, and to theletters of reference marked thereon, making a part of thisspecilication.

The nature of our invention consists in a combination of horizontalshifting levers, with sliding pins, operating on wires.

To enable others skilled in the art to make and use our invention wewill proceed to describe its construction and operation.

A is the frame; B the wire attached to and leading from the levers Calong the frame (which represents the top of a wall or parapet) bypulleys and small iron posts; C the levers which are horizontal restingon a frame work D and are movable. These levers C have movable pins Ewhich operate in the center of the levers C, so that when the machine isset, the pins E rest point to point against each other, and are set andheld fast by a thumb screw F on the front lever C. These pins E thenpress supports the handle ofthe bell hammer H until the machine is putin motion by the pressure upon, or agitation of either of the wires B. Ithe bell which causes the alarm;

J the crank which operates upon the mainspring and cog wheel by whichthe machinery is wound up, on the usual clock principle. V

K are weights attached to an extension beam L which operatesl on afulcrum M, and are also for the purpose of operating on the lever C incase the wire B should be cut, or broken, or burned off. The beam L isattached to one end of the lever C, and the wire B at the other end. Thewires B are tightened, at any time required (when they may have becomestretched by usage) by the screw with ratchet wheel N as fastened to oneend of lever C.

An upright slider O is attached cto. a post of the frame D, this sliderO is raised and raises the bell hammer H when the machine is to be set.The operator then unscrews the thumb screw F and draws forward the pinsE toward the thumb screw F, the levers C then adjust themselves to theirproper position, and the pins E rest against each other at their pointsor opposite ends, forming a straight rod in a line with the spring G.Then the outside head P of the pins E is pressed inward by the operatoruntil the spring G is pressed far enough to allow the handle or wire ofthe bell hammer H to rest upon the pin Q in the head of the spring G,and the operator then screws down the thumb screw F on the pins E. Theoperator then presses down the upright slider O, and b the crankJ(turning the crank J from right to left) he winds up the manspring orcommon clock part, and the machine is then set, and the pressure of thehand, or any agitation of the wire, upon the wires will instantly startthe levers C out of their places, and cause the bell hammer H to strikeagainst the bell and give the proper alarm.

Vhat we claim as our invention and desire to secure by Letters Patentis- The shape and construction of the levers C with their beams L, andweights K, together with the sliding pins E, as operating through thelevers C against the spring G, all in combination as herein describedfor the purposes set forth.

HENRY HER-SH. BENJAMIN BAUMAN. H. C. LOCHER.

Witnesses present:

J. FRANKLIN REIGART, M. CARPENTER.

